129489547 has 8 divisors (see below), whose sum is σ = 143927280. Its totient is φ = 115496160.

The previous prime is 129489539. The next prime is 129489557. The reversal of 129489547 is 745984921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129489547 - 2³ = 129489539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129489547.

It is not an unprimeable number, because it can be changed into a prime (129489557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110472 + ... + 111637.

It is an arithmetic number, because the mean of its divisors is an integer number (17990910).

Almost surely, 2^129489547 is an apocalyptic number.

129489547 is a deficient number, since it is larger than the sum of its proper divisors (14437733).

129489547 is a wasteful number, since it uses less digits than its factorization.

129489547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222173.

The product of its digits is 725760, while the sum is 49.

The square root of 129489547 is about 11379.3473890202. The cubic root of 129489547 is about 505.9157933999.

The spelling of 129489547 in words is "one hundred twenty-nine million, four hundred eighty-nine thousand, five hundred forty-seven".